Threshold studies of gravel size particles under the co-linear combined action of waves and currents


Panagiotopoulos, I., Sylaios, G. and Collins, M.B. (1994) Threshold studies of gravel size particles under the co-linear combined action of waves and currents. Sedimentology, 41, (5), 951-962. (doi:10.1111/j.1365-3091.1994.tb01434.x).

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Description/Abstract

Gravel size sediment beds are tested under the combined influence of simulated wave action and co-linear currents in a laboratory flume. Critical current speed, at threshold, increases with increasing size. Superimposed wave energy causes a small reduction in the unidirectional current energy. For low values of wave-induced near bed current velocities, the resistance to erosion increases when the wave period decreases from 10 to 6 s. Finally, combined critical shear stresses are found to be lower than those predicted using the Shields curve, as modified for oscillatory flow. Grain protrusion is suggested as a mechanism to explain this divergence.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1111/j.1365-3091.1994.tb01434.x
ISSNs: 1469-3496 (print)
1365-3091 (electronic)
Divisions : University Structure - Pre August 2011 > School of Ocean & Earth Science (SOC/SOES)
ePrint ID: 192445
Accepted Date and Publication Date:
Status
October 1994Published
Date Deposited: 04 Jul 2011 14:05
Last Modified: 31 Mar 2016 13:42
URI: http://eprints.soton.ac.uk/id/eprint/192445

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